Disk plow



E. A. DAVIS March 5, l929 DISK PLOW' 4 Sheets-Sheet 2 INVENTOR ATTORNEYFiled Dec. 14. 1926 E. A. DAVIS March 5, 1929.

DISK PLOW Filed Dec. 14. 1926 4 sheets-sheet 3 l INII/ENTOR. @9V/.

95M( Wbm.

ATTORNEY.

March 5, SZL 5;, A, DAW@ 1,794,178

DI SK PLOW Filed Dec. 14. 1926 4 Sheets-Sheet 4 5 lNvENToR f TFRN EYPatented Mar. 5, A192.9.

, UNITED. ,STATES PATENT oFFics.

` ENOCH Amma` Davis. OFWIIQSAKLI., MONTANA.

DISK PLOW.

- Application ledDecemberM, 1926. Serialy 110.154,76.

has been hitherto known in the art` so far 4as I am aware. The importantfeatures of lmy invention are that at all times it is possible to holdthe plow in its substantial forward course despite the strikingv ofobstacles such stones and the like, `and also ina-in tain the properwidth ofthe cut upon hillsides, regardless of the degreeof angularity ofthe hillslope, within reasonable limits. In accomplishing these objectsvit is not necessary that the motive power or propelling force lead offto counteract the natural tendency of the plow to `swerve due totheslope of the hill. I accomplish these and other objects of myinvention bythe peculiar arrangement and combination of the parts aswill be more fully hereinafter described and explained in the followingspecification, shown inthe accompanying rdrawings .and .finally pointedout in the appended claims.

lu the drawings s y Fig. 1 is av front elevation' kwith parts omitted.Fig. 2 is a rear elevation. .Y

Fig. v3 is a side elevation with parts omitted and other partsbrokenaway.V

Fig. 4 is a top plan view. y

Fig. 5 is an enlarged detailed view showing the manner of adjustablyattaching. the disks, partly in section taken upon the line 5-5yof Fig.4.

Fig. 6 is asimilarview showing the n1an ner of attaching the` beams tothe main frame.

Fig. k7 is a similar view taken partly in section upon the line 7 -7- ofFig. `4. y

Fig. 8 is a detailed plan view of the steering mechanism.

Fig. 9 is a long g'itudinalv section ofthe plow. I' c lFig. 10 is atopnplan view showingthe surface of the land and the position ofthe plowin its forward travel. i f

Referring now more particularly tothe drawings, reference numerals l.and 2 indicate respectively parallel beams to which are rigidly securedbymeans of `lOOlts 3, one pair of axles 4 whichin elfect `constitutesthe chassis or main frame of the plow.

are blocks 5l which are. bored through to vbe correspondingly raised.kHaving Secured to the youter ends of all the axles slidably receivesupplemental axles 6 bent at right angles as best seen in Figs.4 l and2, and upon the outer extremity of which aremounted the ground wheels 7held in position by suitablenuts 8. f All of the main axles are upturned`as at -9 and theblocks 5 are, bored; toreceive these upturned por?tions 9. The blocks 5 have perforations as at rl() and the upturnedportions 9 are simi#l larly perforated so that pins ymay be passedthrough the perforations and thereby secure ,I

the upturned lportionsf) tothe blocks.

This adjustability of the axles will allow theplow yframe or chassis tobesupported atany pre-determined height above the surface of theground,whichfinturn will allow the plows to outr inca correspondingdepth as will be hereinafter more fully explained.

ySecured to eac/hof theblocks 5j is a sector 11 with the teeth of whicha tongue 12 is adaptedr to engage, the said tongue being islidably,mounted upon a lever 13 whose outer end is pivoted at 14 to a collarl,

rigid with the block 5. ,16 is a link Vonev of whose ends is pivotedaty17 to the lever 13 and its opposite yend isgbifurcated as shown andpivotedat 18 to a bifurcated collar 19 through which the supplementalVaxle, 6 slidably and rotatably passes. rBe` tween the legs of theAcollar vlQis a ring 20 which is` secured to the shaft 6 by means of fa. screw 21 (see'FigsLQ and3). All of the four ground wheels yand theirconnections as just describedf'are kidentical with each other. From theforegoing 1t will be seen that in addition to .the `adjust/ability ofthe mainframe, consisting of the perforations 10 and suitablepins, astill greaterlexibility of control is afforded for any one corner of theframe in kcase it isrequired to raise or lower it due to the result ofthe scribed the one pair `ofaxles 4, the opposite kpair 22 have theirrespective ends pivoted at andf24 respectively. The pivotal connectionE24r is inthis instance 1n the form kof a ball and socket joint, theball member .being secured tothe rear axle 44 by' means 1 `of bolts 25;The other axle 22 is bifur rated as indicatediu dotted lines at`26 andyhas a pin 27 passing throughgasuitable `aperture inthe axle andabearing 28 secured tothe bea1n2. kA link 129 has oneof f its endspivoted at 30 to the beam 2, andl its opposite end is sni'nlarlyconnected toV the outer end of the forward axle 22. A similar link 29aconnects the rear axle withthe beam 2. 3l represents cross beams whichpass through boxes 32 secured toA the beam 2 (see Fig. 6). rbese boxesare flared as at 33 so as to allow a rather Ypivotal movement ot thebeams 3l within the boxes. The outer ends of the beams 3l are perforatedas at 34 and there are riorresponding perorations 35 in the beam l sothat each beam 31 may be moved about the center of its box 32 to asuitable degree and pins passed through the apertures and so as to holdthe beams in position. The opposite end of each beam 3]. has adjustablysecured to it a shank 32 on which is mounted a disk 36. These disks arevertically adjustable by loosening the nuts 33 which will allow theshank 32 to be moved to a desired position and then vby screwing up thenuts 38 the shank will be bound tightly to its cross beam 3l. The disksare also adjustable laterally as already explained. It is quitedesirable that the dis rs be vertically adjustable because in thegrinding or sharpening ot the disks the diameter of some ot them aredecreased' greater than others due to the varying hardness of the metal,'and if the disks were not vertically adjustable, any of the disks ofsmaller diameter than the others would notplow so deeply. lt will bequite clear that this objection does not exist because, due to thevertical adjustment, the lower circular edges of all the disks will bein the same horizontal plane regardless of the varying diameters of thedisks.

39 indicates a plate pivoted upon `a bolt 40 and through its oppositeend is an aperture 41. The bolt 40 is rigid with a U- shapedv plate 42(see Figs. l and' 4), which is bolted at 43 to the beam 2. Rigidlysecured by means of the bolts 44a, to the plate 39 is a bracket 44 uponwhich is pivoted at 45 a steering lever 46. 47 indicates a toothedsector rigid with the bracket 44 and with which is adapted to co-act atongue 43 so that when the tree end of the lever 46 be moved about itspivot 45 the tongue 43 kwill hold the lever in any ot its movedpositions. 49 is a link, one of whose ends is pivotally connected at 50to the lower extremity of the lever 46 and its opposite end is similarlyconnected at 51 to an arm 52 which extends upwardly and outwardly fromthe hub ot the ground wheel 7. 53 is a tie rod, each ot' whose ends ispivotally connected to one ot the arms 52, whereby a movement of thefree end oi2 the lever 46 will cause both of the arms 52 to be actuatedso as to turn both the ground wheels 7 simultaneously about theircenters ot movement represented by the supplemental rthrough the"ti-shaped plate 42.

axles 6. This constitutes the front steering mechanism. 54 is a link,one et whose ends is pivotally connected at 55 to a projection 56 ot`the. beam 2 and its opposite end is perforated so as to receive thebolt 40 which passes also through an aperture in one end ot' the plate39, and also a similar aperture There are a plurality o't apertures inthe U-shaped plate 42 indicated at 56. By this arrangementit will beseen'that it the bolt 40 be withdrawn the plate 39 may be movedcrosswise ot the trame which will of course cause the front groundwheels to be correspondingly canted,

the rearwheels lcannot accommodate themselves to this movement.Therefore, it is necessary to provide means to bring therear groundwheels into parallelisn'i with the iorward ground wheels. To do this lprovide a shaft 6() having a steering wheel 6l on one ot the ends andupon 'its opposite end a pinion 62, there being suitable bearings 63Yfor the shaft, projecting upwardly from the main frame. Vrlhe pinionwheel 62 coacts with a rack 64 upon `a connecting rod 65 each of whoseends is pivotally connected to a bell crank lever 66 extending outwardlyfrom the members 6. By this arrangement the operator may grasp thehandle 67 upon the wheel 61 and by rot-ating the'shatt 60 cause both ofthe rear wheels to turn about their respective centers represented bythe members 6.

Either dratt animals or other motive power are connected to the deviceby any suitable means such as a chain 68. lVhen no plowing is involvedand it is necessary to move the device from place to place such as alonga country road or from the held llt) to the barn, the plbws 36 areelevated above the ground by means of the levers 13. That is to say, adownward movement ot the tree ends of the levers 13 will cause all ofthe blocks 5to rise, due to their sliding movement with respect to themembers` 6 which will of course raise the frame correspondingly carryingthe plows withit, clear ot the ground.

In operative position, all the ground wheels assume about the positionas seen in Fig. 10. However, in beginning the plowing operation andbetere any furrow has been eut, the plows are caused to descend into thesoil a predetermined distance by means et the levers 13 as alreadyexplained. i

The ydevice is caused to travel'steadily torlll) ward until the iirstfurrow is out around the field or area being,` dealt with. During` thecuttinp` of the first furrow all around, both the forward ground wheels7 kare of course travelling upon unplowed ground After the first roundor furrow is completed the right forward ground wheel Atravels withinthe furrow which hz just been cut7 as plainly seen in Fig'. l0.. llerexample, the dotted line indicated atri in Fig. l() may represent thecompletion of the cycle or in other words the completion of the furrowaround the field. i-'is seen in l0, the right forward ground wheel is ofcourse still upon unplowed ground and remains so until i t reaches thedotted line A, whereupon it will drop to the bottom of the furrowalready made so that the next furrow or round will be plowed to the samelevel of the furrow just plowed.

In order to maintain the rear right ground wheel in its position withrespect to the plows as seen in Fig. l0 it is desirable that the axle lof that wheel be adjustable trans versely of the frame. I accomplishthis by moving;` the axle l of that wheel to suit conditions and when somoved drop bolts through the apertures in the axle and beams l and 2.

'lhe ground wheels 7 are brought to an edge, as plainly shown, so as tosomewhat eut into the soil and thus assist in maintainingv all thewheels in parallelism. I-Iowwer. since the plow when in actualy operation asseen in Fig. l() is more securely held in position by reason ofthe fact that the right forward ground wheel is always within the plowedfurrow and against the bank of the furrow indicated at I3 in Fig. 9.YShould a rock or obstacle be encountered bythe front forward wheel, forexample, the tendon y of course would be' for that wheel to rise out ofits furrow in which case the forward steering lever 46 is opel ated tobrine' the forward end of the plow back into the proper position, whichcan' be instantly done by the operator. If it were not for this quicksteering,` mechanism, it is obvious that by the time the forward wheelswere ri! stretch of unplowed ground would remain. Regardless of thecanted position of the plow when in operative position, as seen inFigi'. l0. the stress or line of force cxcrted by the draftanimals or.motor is ab ways straight forward,r as seen in Fig. 9, and parallelwith the banks 9. Y

vWhile I have shown a particular form of embodiment of my invention, Iam aware that many minor changes therein will readhted, as indicatedqquite a.

ilyy suggest themselves to others skilled inl the art withoutdeparting;` yfrom the spirit and scope of my invention.` I ytherefore dform of embodiment which I have herein shown and described. lHavindescribed my erire to avoid being limited to vthe exactV inveniion.ywhat Iclaim as new and desire f to protect by Letters Patent, is

l. iin agricultural implement including a lramework made up of spacedparallel bars, front and rear ground wheels for support- .ingr thefraniework,` axles for `the ground wheels on one side yof the frameworkandk secured to both bars of the framework, an

said means to vertically adjustfthe frame'- work with respect yto the`ground wheels, plow beams supported for swinging move ment on one ofthe frame bars,` and means rwhereby the plowfbeams may be adjustablyconnected to the other of said frame bars; y 2. rin agriculturalimplement including` a franiework made up of spaced parallel bars,

front and rear ground wheels'for supporting 4 the fran'iewoik axles forthe ground wheels on one side of the framework and secured to both ba-1s ofthe framework.l an axle for the forward `ground wheel on thevopposite side of the framework, means for pivotally connecting the rearend of the lastnamed axle to `one `of the frame bars7 an axle for theremaining); rear `ground'wheel7 said axle being pivotally connected tothe axle of the opposite ground wheel.` means whereby the framework 'issupported for` vertical movement relative to the ground wheels, manuallyoperable mechanism for actuating said `means to vertically adjust theframe work with` respect to the ground wheels, plow beams supported forswinging' movement on one of the frame bars, means whereby the plowbeams may be `adjustably connected to the other of said frame bars,mechanism adjustable with respect to one of the yfname bars for steeringthe forward ground.wheelsVand manually operable means supported by theframework for steering the rear ground wheels.

In testimony whereof I affix 'my signature.

ENOCH ABNER DAVIS.

